two frequency method

At last, a maximum likelihood estimating method of sampling frequency offset by transmitting two identical OFDM symbol was proposed.

通过连续重发两个相同的OFDM符号，应用最大似然估计方法确定采样频率偏差。

The paper first analyzed these two time frequency analysis methods& short time Fourier transform and short frequency time transform, and illustrated that time frequency analysis method can be used to depict temporal properties of signal in detail by theoretical re cords;

本文首先分析了短时Fourier变换和短频时间变换这两种时频分析方法，通过理论记录说明时频分析方法可以细致地刻画信号的时间特性；

By means of the mechanical method of two sets of closed system of force and elasticized closed sub-system of force, a test on enlarging tonnage capability of the high frequency tensile and compression fatigue testing machine has been evaluated.

本文利用二套封闭力系及子封闭力系弹性化的机械方法，在小吨位高频拉、压疲劳试验机上首次完成了超吨位试验的技术签定。

This method combining the adaptive Funnel filter ( AFF) with sliding Goertzel algorithm ( SGA) can accurately track the signal frequency and calculate the phase difference between two signals.

该方法将自适应Funnel滤波器（AFF）和滑动Goertzel算法（SGA）结合起来，能够精确地跟踪信号的频率，计算相位差。

So the frequency domain equal energy wave door method with frequency modulated continuous triangular wave system signal is designed for estimating the distance along the axes and the radial velocity through two range wave doors scanning the main valve area of the echo while sliding.

故设计采用调频连续三角波体制信号，通过两个距离波门对主瓣回波区进行滑动扫描的频域等能量波门法估计轴心距离和径向速度。

Two analysis method of resonant frequency in thermoacoustic systems

末日意识热声系统谐振频率的模拟分析

Two-Dimensional ESPRIT Method for Sinusoidal Signal Frequency Estimation

二维正弦信号频率估计的ESPRIT方法研究